Many studies have shown that stop signs are not an effective measure for controlling or reducing midblock speeds. Observance studies show that, when there are too many stop signs, approximately half of all motorists came to a rolling stop and 25% do not stop at all. Stop signs can give pedestrians a false sense of safety if it is assumed that all vehicles will come to a complete stop at a stop sign. Studies show that placing stop signs along a street may actually increase the peak speed of vehicles because motorists tend to increase their speed between stop signs to regain the time spent at the stop signs. Finally, the MUTCD states that "YIELD or STOP signs should not be used for speed control."